appending a file
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i have a file called hello.txt using wordpad which contains the matrix
2 7 3
2 6 9
now i have a vector v = [1 2 3] and i want to add this vector to the hello.txt file so when i open the hello.txt file i should have
2 7 3
2 6 9
1 2 3
how can i do this
采纳的回答
Walter Roberson
2012-3-15
fid = fopen('hello.txt', 'a+');
fprintf(fid, '%d %d %d\n', v);
fclose(fid);
4 个评论
lowcalorie
2012-3-15
Walter Roberson
2012-3-15
Change the 'a+' to 'at'
And while you are at it, switch to a more modern text editor ;-)
Walter Roberson
2012-3-15
See, Jan, people do still use WordPad and still need the 't' permissions ;-)
Walter Roberson
2012-3-15
>> !cat hello.txt
2 7 3
2 6 9
>> fid = fopen('hello.txt','at')
fid =
3
>> v = [1 2 3]
v =
1 2 3
>> fprintf(fid, '%d %d %d\n', v);
fclose(fid);
>> !cat hello.txt
2 7 3
2 6 9
1 2 3
更多回答（1 个）
Walter Roberson
2012-3-15
8 个投票
Your existing question is still here and still active. Please do not open duplicate questions: it just leads to frustration and confusion.
If you require answers within 10 minutes (as implied by the time between your reply here and the time you opened the duplicate question), then you should be hiring a consultant.
1 个评论
Wayne King
2012-3-15
I second Walter's sentiment. People are volunteering their time to help you.
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2012-3-15
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